This study determined antioxidant and sensory effects of cinnamon, cloves, fennel, pepper, and star anise (Chinese 5-spice ingredients) in cooked ground beef. In experiment 1, thiobarbituric acid (TBA) values of cooked samples were measured during refrigerated storage. In experiment 2, trained panelists evaluated cooked samples for rancid, beef, and spice flavor intensity. Total aerobic plate counts were also measured.
Mean TBA values were high (3.4) for control samples. In previous studies, TBA values >1.0 were associated with unacceptably rancid cooked meats. At the lowest spice level of 0.1% of meat weight, all spices except pepper had lower TBA values than controls. Thus, the minimum effective level was 0.1% for all spices except pepper. For all spices except cloves, increasing the use level to 0.5% significantly decreased TBA values (dose-response effect). Cloves did not exhibit a dose-response effect, since all clove levels were very effective, and not different, for maintenance of TBA values
In experiment 2 (sensory evaluation), there was a high positive correlation (p < 0.01) between TBA values and panel scores for rancid odor and flavor (0.83 and 0. 78, respectively). Hence, TBA values were in good agreement with sensory panel scores as a measure of oxidation during storage. Spice flavor was inversely correlated (p < 0.01) with rancid odor and flavor (-0.57 and -0.61, respectively), suggesting that spices also decreased the perception of rancid flavor in these samples. The 5-spice blends did not inhibit microbial growth of cooked samples during storage, compared to controls, perhaps due to heat inactivation or loss of antimicrobial components from the spices during cooking. In conclusion, all spices and blends had a dual effect, reducing chemical oxidation as measured by TBA values, and also imparting a distinctive flavor to cooked ground beef.
| Identifer | oai:union.ndltd.org:UTAHS/oai:digitalcommons.usu.edu:etd-6577 |
| Date | 01 May 2005 |
| Creators | Dwivedi, Saumya |
| Publisher | DigitalCommons@USU |
| Source Sets | Utah State University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | All Graduate Theses and Dissertations |
| Rights | Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact digitalcommons@usu.edu. |
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